51705552172 has 12 divisors (see below), whose sum is σ = 92930249440. Its totient is φ = 25154052336.

The previous prime is 51705552137. The next prime is 51705552277. The reversal of 51705552172 is 27125550715.

It is a happy number.

It is a super-2 number, since 2×51705552172² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174680772 + ... + 174681067.

Almost surely, 2^51705552172 is an apocalyptic number.

It is an amenable number.

51705552172 is a deficient number, since it is larger than the sum of its proper divisors (41224697268).

51705552172 is a wasteful number, since it uses less digits than its factorization.

51705552172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349361880 (or 349361878 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 40.

The spelling of 51705552172 in words is "fifty-one billion, seven hundred five million, five hundred fifty-two thousand, one hundred seventy-two".